01-15-2015 07:04 AM - edited 03-17-2019 01:35 AM
While on conference calls, whether conferenced through the phone or through a toll-free service, our 9951 and 9971 phones often go into Preservation Mode and disconnect the call. Going into Preservation Mode seems to be a known bug, but the call is supposed to stay active, while ours do not.
We have updated to the latest firmware for both models, 9-4-2, and that seemed to help the problem, but it has not gone away completely.
We are on UCM version 9.1.2.10000-28